Monterrey PillowTop Waterbed Insert



fs_prod1 (1)Abandoning Your Old Water Mattress?

Your waterbed isn’t comfortable anymore? Thinking it might be time to throw away your old hardside waterbed? Just do it!  Before you do, we would like to suggest that you keep your headboard, wood frame, drawers, and everything else except the water mattress and heater.


Replace them with Therapedic’s most lavish water mattress replacement. The Monterrey Pillow Top Waterbed Insert.


Read more important details and specifications below.
See other Therapedic products

Price Includes:
SKU: montptInsrt1133i-Parent Category: Tags: , , ,


The Monterrey PillowTop Waterbed Insert – Regular Mattress Made To Fit Waterbed


Therapedic’s Monterrey PillowTop Waterbed Insert is a true mattress marvel. Our engineers have created the most magnificent replacement conventional mattress that simply drops right into your hardside waterbed frame. It features a unique double-sided euro top design that will pamper you each and every night in layer after layer of premium, medium soft cushioning.


All of this luxurious upholstery is placed upon our most supportive, modern coil spring technology for unmatched firm core support. This combination is melded together to create a unique feel that won’t make you miss your old water mattress. This is a fantastic substitution mattress for your old water mattress.


The best part is that it allows you to still make use of your existing wood bed frame, waterbed headboard, and even drawer pedestal and or matching bedroom furniture. You need only to remove the heater and water mattress. It is intentionally fabricated to be slightly smaller than the empty wooden bed cavity leaving enough room for your hands to make and tuck in your bedding. It includes premium construction, is designed with a special fit, and is amazingly comfortable and supportive – why would anyone even want to consider the expense of buying a brand new mattress set, bed, and bedding.


It is important to note that a combination of the firm core support and cushy surface helps make the transition easier from your waterbed to a regular mattress. The softer cushier surface feel is similar to a waterbed, but with the extra strong support of steel coil springs gives you the much-needed support for your back and body. The deliberate old-school 2-sided flippable design promotes more even mattress wear and extends the life of the insert with regular care.


The profile is thick, making it easy to get in and out of the bed without climbing over the wood sides. Lastly, it is undercut 1 inch all the way around for simple things like tucking in sheets.


Did We Mention The Benefits?

  • Two Sided.
  • Flip it over.
  • Spin it around the end to end.
  • Double-sided.
  • Turn it over.


Firmness Rating Scale: 1 through 10

1 is our softest feel, and 10 is the hardest feel


1 = Our softest water mattress

4 = Our firmest water mattress

5 = Is our softest coil spring mattress NOTE (Our softest coil spring mattress is firmer than our firmest water mattress)

10 = Is our firmest coil spring mattress

Monterrey Pillow Top Waterbed Insert. Firmness Rating 6 to 7. Firm core support with a cushiony pillow top that will not give you a smothering feeling like so many soft mattresses.



Detailed Specialty Measurements / Sizing


Mattress Height/Thickness:

Top To Bottom– Approx. 14 ”


Super Single Waterbed Frame

  • Cavity Measures 48 wide X 84 long
  • Drop-In Water bed Mattress Insert Measures 46 wide x 82 long
  • Shipping Dimensions (85 L x 15W x 64H x Wt. 100 lbs.)


California Queen Waterbed Frame

  • Cavity Measures 60 wide X 84 long
  • Drop-In Water bed Mattress Insert Measures 58 wide x 82 long
  • Shipping Dimensions (85 L x 15W x 64H x Wt. 110 lbs.)


California King Waterbed Frame

  • Cavity Measures 72 wide X 84 long
  • Drop-In Water bed Mattress Insert Measures 70 wide x 82 long
  • Shipping Dimensions (85 L x 15W x 74H x Wt. 130 lbs.)
3.4/5 (17 Reviews)

Additional information

Weight N/A
Dimensions N/A

, ,


Product Features

Monterrey PillowTop Waterbed Insert Features


  • Fabric–Stretch Knit w/Surface Fresh ™.
  • Quilt–FR Safe Barrier, 1″ High-Performance Gel Foam, 1/2″ Comfort Foam.
  • Euro Style Pillow Top—1″ High-Performance Plush Foam, 1″ High-Performance Support Foam.
  • Upholstery–3/4″ Support Foam, Insulator Liner.
  • Support System–805 Alternating Coil LFK.
    • Coil Units have been modified for special construction.  Counts may vary slightly.
    • Twin–462
    • Full–660
    • Queen–805
    • King–1015

Edge – Superior Foam Encasement

Warranty – 10 Year


It Couldn’t Be Easier


  • Choose your size: Super Single 46 x 82 | California Queen 58 x 82 | California King 70 x 82
  • You won’t have the issue of climbing in or out of your bed anymore.
  • Two-sided for longer life. Can be rotated and flipped over for more even surface wear.
  • One of our top 3 sellers. Makes the adjustment from water to coil springs easier.
  • Firm support for your back with a luxurious sleeping surface that cradles your body.


Photo for illustration purposes. Fabric color may vary from the actual photo.


3 reviews for Monterrey PillowTop Waterbed Insert

  1. Kevin Bennett (verified owner)

    After sleeping on water for over 40 years, I thought we would try this PillowTop mattress insert after our water mattress sprung a leak. I was a little hesitant, since there were no reviews on this mattress, but our gamble payed off. A day or so after placing my order an associate from STL called verifying frame measurements, and describing what to expect in the mattress fit, feel and comfort. Granted, we’ve only been on the bed for a couple of weeks now, but were super happy with this purchase. The mattress is super well made, with handles built into each side. My wife and I slid it into the bed frame with ease, and left the waterbed liner in the frame for mattress protection. The mattress fit perfect, and with the slight under-sizing, was easy to make up. With the 15 inch height, you never hit the bed frame getting in or out, and compared to water, is much easier to turn over at night, and get in and out of. Very comfortable, and very happy with this purchase, so far.

  2. Douglas Belleville

    Kevin, We appreciate you taking the time to share your STL Beds experience and your thoughts on the waterbed insert. We wish you continued comfort and happiness. Thank you again for purchasing your mattress through STL Beds. Doug Belleville Owner

  3. Honey (verified owner)

    This waterbed pillow top mattress insert is AWESOME!! My husband and I have slept on a waterbed over 35 years and this change has been a blessing! The comfortable rest that we get now is a God send!! I wish we would have made the change sooner.
    The customer service I received from Doug, the owner was EXCELLENT!! I had placed the order early morning on the 4th of July and he personally called me on the holiday to go over my order in extreme detail to ensure I was getting exactly what I wanted and that all measurements were correct. He even took time to explain the delivery process, and assured me full satisfaction if there happened to be any damages during the shipping process. I recommend this company and this matteress for everyone!!

  4. Douglas Belleville

    Honey, I am so happy to hear everything went a planned. New beds are like new tennis shoes, you just din’t know how poorly we were being supported until we slipped into the new one. I appreciate the compliments, we strive to make sure all goes well and most of the time it does, those phone calls help us cross the T’s and dot the i’s so if something were to go south, you would be prepared and everything would continue to go smoothly should damage occur. We thank you again and hope you enjoy your new investment in you 😉 Take care Doug

  5. Jacqueline Foulk

    After 30 years of sleeping on a waterbed, I finally convinced my husband it was time to change. I’m SO happy I found STL Beds! Their customer service is top notch; nothing but smooth and consistent communication from start to finish. Their product is of the highest quality. I love the way the mattress sits up high; I feel like a princess. The bed is Goldie Locks comfortable ~ not too hard, not too soft…it’s just right! I love not having to struggle to change positions; I love not sinking to the bottom of the bed when I’m the only one in it. My only regret is not doing this 20 years ago! If you’re on the fence about replacing your waterbed, I highly suggest jumping over to STL Beds. You will NOT be sorry!

  6. Douglas Belleville

    Jacqueline, Thank you for the kind words. We simply treat people the way we want to be treated. When we go into a store or call someone, we need help. My staff hates one word answers or worse ye the big store experience when staff tries to avoid you. We are so happy you found us and hope you have many years of good comfort and support. Again thank you for working with STL Beds. Doug Belleville

Add a review

Your email address will not be published. Required fields are marked *

You may also like…